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overflow: Correct check_shl_overflow() comment

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commit 4578be130a6470d85ff05b13b75a00e6224eeeeb upstream.

A 'false' return means the value was safely set, so the comment should
say 'true' for when it is not considered safe.

Cc: Jason Gunthorpe <jgg@ziepe.ca>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Fixes: 0c66847793 ("overflow.h: Add arithmetic shift helper")
Link: https://lore.kernel.org/r/20210401160629.1941787-1-kbusch@kernel.org
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Keith Busch 2021-04-01 09:06:29 -07:00 • committed by Greg Kroah-Hartman
commit 0f6dd56712
1 changed files with 1 additions and 1 deletions
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2
include/linux/overflow.h
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@ -235,7 +235,7 @@ static inline bool __must_check __must_check_overflow(bool overflow)
* - 'a << s' sets the sign bit, if any, in '*d'.
*
* '*d' will hold the results of the attempted shift, but is not
* considered "safe for use" if false is returned.
* considered "safe for use" if true is returned.
*/
#define check_shl_overflow(a, s, d) __must_check_overflow(({ \
typeof(a) _a = a; \